71 Try reversing the first two words for the definition element of the clue
76 It is an anagram, but not the words you mention. Keep looking.
84 Not a P word and not Spanish. Petitioned is the definition.
87 A colin is a particular type of bird (apparently). Wish I had your dictionary though.
90 This is only a partial anagram. Not even = take the odd letters only.
100 The writer is an old-fashioned writing implement. The answer is a slang word for lots.